Furnace.



No. 886,205. P. GOLD.

FURNACE. APPLIOATION FILED SEPT BO. 1907.

- PATENTBD APR. 28, 1908.

2 SHEETS-SHEET 2.

FRANK GOLD, OF RICHMOND, VICTORIA, AUSTRALIA.

Specification of Letters Patent.

Patented April 28, 1908.

Application filed September 30, 1907. Serial No. 395,240.

To (LZZ whom it may concern:

Be it known that l, FRANK GOLD, a subject of the King of Great Britain and Ireland, residing at 95 Palmer street, Richmond, in. the county of Bourke, State of Victoria, Commonwealth of Australia, .manufacturer, have invented certain new and useful improvements in Furnaces, of ,which the following is a specification.

My invention rel'ailcsto steam boiler or other furnaces or heat generators. its object is to effect a more perfect combustion of the fuel and to prevent the emission of smoke from the smoke stack top. l nthe past a varicty of devices have been used to this end, but with my invention the parts involved are. few, are not liable to derangement, can be easily rcplz'rcod not (:XpsiisiVs to purchase, call for little labor in their installation, and insurc lhc complete buri'iing before it reaches the chimne", of all the unconsumcd carbon which escapes from the iire top.

Referring to the drawings which form a part of this specification Figure l is a vertical longitudinal sectional view of part/of boiler furnace having the grate in section and the bridge all and central longitudinal elevated airsupplier in side elevation. Fig. 2 is a sectional elevation, on an enlarged scale, of the bridge or diaphragm shown in Fig. l. with the addition of an end elevated air supplier formed integral therewith. F b is a sectional view of my bridge or diaphragm as if taken through i i-1i Fig. A part has been broken away for convenience of illustration. An end elevated air supplier is not shown but in its place the fire bar rest. Fig. 4 is a front eldvation, on an enlarged scale and partly in section, of furnace showing my bridge or diaphragm, and central longitudinal elevated air suppliers and their bearers, my side elevated. air suppliers and their bearers, my end elevated air suppliers and the fire bars all in position. Fig. Sis an enlarged sectional view of a modiiied bridge or diaphragm in conjunction with my central longitudinal elevated air suppliers and their bearer. An end elevated air supplier is also shown in position. Fig. (i is a side elevation on an enlarged scale of one of my side elo vated air suppliers. Wheiran end elevated air su )plier is used the abutting end of each 3 side el evated air supplier may be of any suit- 1 I stances.

able conformation to agree with the outer con ormation of the end elevated air supplier. Fig. 7 is a plan on an enlarged scale of one of my side elevated air suppliers.

Similar numerals of reference indicate similar or corresponding parts where they occur in the several views.

My invention includes a furnace such as 2 (Figs. 1 and 4). This can be of any character. hlear the front of this is a dead plate 3. At or near the back of the said furnace is situated a bridge or diaphragm (see also Figs. 2, 3, d, and 5). The said diaphragm can be made of metal or of fire brick or of any other material or materials or combination of materials and consists of a diaphragm front 4 and a diaphragm back 5, assisting to form a hot chamber 22 (Pi s. 2 and 3). The upper portion of the said d1 aphrag [11 has an inclined top as 6 which descemls downwardly towards the back of the said diaphragm, and is below the furnace crown. The said top has anoverhanging portion 7. This is so shaped that a whirling action is set up in front and beneath it causing any smoke. that rises to the furnace crown to whirl back upon itself before it passes over the rounded top 6. The amount of roundness or curvature of the top 6 and the amount of the overhanging portion 7 will depend upon circumstances. The diaphragm bottom 8 may have a back flange protruding therefrom. From the diaphragm iront protrudes a fire bar rest 10 (F lgs. 1, 3 and 5). The said diaphragm may be supported by any suitable means.

in a modification of the foregoing the hot chamber 22 may be dispensed with as shown in Fig. 5. The diaphragm may also have its front a concave to accelerate the whirling action as indicated in the said Fi 5. If the diaphragm be formed of'fire brie r the fire bar rest 10 and the hot chamber 22 may or may not be dispensed with. When formed of such material the diaphragm may rest upon an H or other sectioned girder extending across the furnace upon. which girder also preferably rest the fire bars.

Through the dia hragm front and back are situated draft ho es 11. The number of these, their area, conformation and relationship to each other will depend upon circum- Preferably if the holes inthe diaphragm front are vertical those in the back are horizontal. The front and back draft holes in any case are preferably out of alinment with each other. The draft currents and their constituents are thereby more effectually split up or divided. 1

Inside the diaphragm and between the front and the back of the same and extending from side to side is an ash chute 12. This is inclined downwardly at its back end. All ashes that are carried by the draft through the holes of the diaphra In front which fall upon this chute descend ownwardly into the ash pit at the furnace bottom.

If the hot chamber 22 be dispensed with and the diaphragm be solid as indicated in Fig. 5 (which may or may not be the case when formed of fire brick) the draft holes 11 extend right through the same, but are not necessarily of the conformation or size shown in the drawings. They may be circular or be inclined diagonally across the diaphra m. The said diaphragm may also be outstanding at the bottom. with air passageways through said outstanding portion. Or end elevated air sup liers 31 (hereinafter described) may be use In combination with the foregoin I place in the center of the furnace2 and o' the fire bars 21 central longitudinal elevated air su pliers 13 (Figs. 1, 4 and 5). These can e made of metal or of fire brick or of any other material or materials or combination of materials and are upstanding above the said fire bars. These air suppliers are preferably divided into sections. These sections may be connected together in any well known way. Each section is hollow and has therein an openbottomed air chamber 14. Between the inside and the outside of the air chamber are air outlet passageways 15. The number of the said air outlet assa eways, their distance from each ot ier, t eir conformation and also their area, will depend upon circumstances. End air passageways 17 may or may not be provided in each section. Beneath each section is a dropper 16. Each of the said sections may be dlvided into two or more horizontal layers. One layer of one section may be'of one material and the ad'- joining layers ,of another. This .enables a worn or burned out portion to be removed or replaced With a minimum of labor and expense. The central elevated air suppliers may not touch the diaphragm but be any distance away from the same'as illustrated in Fig. 5 and as will be hereinafter more fully understood;

Beneath the elevated air suppliers before referred to is situated a bearer. This bearer consists of two side members 18 and two end members and supports 19. Or there may be an end member with a suitable support integral therewith or attached thereto. From eacn. side member may protrude spurs 20.

One of the"'end members and supports rests upon the dead plate 3 and the'other upon the fire bar rest 10 ,'or upon 'a girder extending across the furnace.

In combination with the foregoing I use side bearers (Fig. 4). Each side bearer has an outer longitudinal member 23 and an inner longitudinal member 24. The outer member 23 which is placed against the furnace wall is shallower thanthe inner member 24, againstwhich is placed a fire bar. The side bearers are, in conformation; somewhat similar to the bearer beneath the central longitudinal elevated air' suppliers; having spurs 25 on the inner'member 24 and having two end members and supports 26. One of the end members and su ports rests upon the dead plate3 and the ot er upon the fire bar rest 10 or upon a girder extending across the furnace.

above each side bearer is situated aside elevated air su p'lier. This can be made of metal or of fire brick or of any other material ,or materials or combination of materials and side piece 27. Pro' consists essentially of a v truding inwardly towards the fuel and into-. gral with or attached to the side iece are ribs 28. These mayhave lugs '29 thereon. By the lugs the side elevated air supplier is maintained inits correct relative position upon its bearer. Integral with or attached to the ribs 28 are,longitudinal ribs 30. These preferably are higher in their center than at ,their ends. .Or they may be higher at one end than at the other. The said ribs may be of the conformation shown in Figs. 6 and 7 or of the conformation shown in Fig. 4. The number, area, conformation and relationship to each other of these ribs depends on circumstances.

The side elevated air sup liers may be in sections. When formed of iii" are dispensed with and longitudinal,circular or air passageways of other conformation and i an area or size are made therein.

n combination with the foregoing I may\ use an end elevated air supplier or supphers 31. brick or of any other material or materials or combination of materials and may be integral with or attached to the diaphragm front 4, as shown in Fig. 2 or separate therefrom as shown in Fig. 5. The said end elevated air supplier has air outlet passageways 32 therein which may be of any conformation or area, depending upon circumstances. Their number and distance from. each other also depends u on circumstances.

he en elevated airsupplier or suppliers may be in sections. When formed of metal they may have ribs of any character as indicated in Figs. 4 and 5, thespaces between which ribs form air passageways. Suitable air passageways may also be formed inthe This can be made of metal or of fire' e brick the ribs fit) ', said central e the furnace would be used.

fire bar rest, the bearers and the fire bars it such be necessary to allow air to pass into the said end elevated air supplier (Flg. 5).

As can be well understood in constructing my invention different materials are used to suit diilercnt circumstances. Details in construction must be made to suit the material. For instance various details may be included when my invention is termed of metal wnich would require to be'excluded when formed of iire brick. Also when my central longitudinal elevated air suppliers are touching the diaphragm front there would be an end elevated 'air su )plier each sidcof and between levated air suppliers and the side elevated air suppliers. WVhereas when the central elevated air suppliersare some distance from the diaphragm front only one end elevated air supplier extending across Therefore 1 do not wish to be understood as limiting myself to the exact details of construction and arrangement described since various-slight and immaterial modifications may be made therein without departing from the spirit and the scope of my invention.

Having now described my invention, what 1 claim as new and desire to secure by Letters Patent is.-

. 1. In combination with a furnace grate, a hollow bridge wall having front and rear walls and its upper portion overhanging toward the grate and provided with draft apertures for the products of combustion in its front and. rear walls, and a hollow air sup- 1 1 i l l l g plier at the lower edge and front side of the bridge wall.

In combination, a furnace grate, a bridge or .liaphragm halving its upper por tion projecting inwardly toward and partially overhanging the fire; and having draft a er tures torthe products of combustion be ow said overhanging portion, and a hollow air supplier at the lower edge and front side of said bridge. I

3. Theco'mbination of a grate, a bridge at the inner end thereof provided with draft apertures t'or the products of combustion, and having its u Jper portion projecting toward the fire, -a hollow air supplier above the grate at the base of said bridge, air suppliers at each side of the grate, and a central air supplier open at the bottom and having apertures in its sides for the escape of air.

4. In comhin ation, a grate, a hollow bridge wall at the inner end of said grate having front and rear walls, and an overhanging portion rejecting toward the rate, and provide with drattf holes for t ne products of combustion in its front and rear walls below the overhanging portion; a hollow end air supplier mounted at the lower side and in front of the bridge, hollow side air suppliers and a hollow central air supplier.

In testimony whereof I afiix my signature in the presence of two subscribing witnesses.

' FRANK GOLD.

ll itnesses:

EDWIN fniLLnes, Qnoxn W. Ln PLASTRTWP 

